Why

The world is in a pretty dark place at the moment. Europe has Karma of Conflict, having been the birthplace of two World Wars, but it is not the only place that has such karma. Some buddhist traditions choose to observe this world as a Matrix like Simulation.
A core belief of Nichiren Buddhism is because we are in the world we can change it, we seek to Change the Destiny of Mankind, due to the Oneness of self and environment.

What if Oneness of Self and Environment was true?

That would mean no matter where or who you are, people like you can make a difference! What if you could all chant together, where ever you are together as one, the one mind the one voice? What if your Daimoku was the last voice on earth, would you not chant a few minutes longer if you could?
Our Shared vision is the idea that somebody somewhere is chanting for Kosen Rufu, that this is an unending stream of determination.
When one person chants with the power of 10,000, what if 10,000 people chanted single-mindedly for Kosen Rufu? How would the world change bathed in daimoku? I have faith that that our daimoku can lift this world out of darkness, that we can transform karma, that we can Change the Destiny of, and elevate Mankind. Your Daimoku matters.
Time alone will reveal to the world whether our actions have been worthwhile.

How

We believe in our Buddha nature. We believe in our lives that are one with the Mystic Law. As long as we have faith based on the Gohonzon, we will triumph over whatever hardships we may presently face. Mr Toda urged us to make the Gohonzon the core of our convictions and unite in the spirit of 'many in body, one in mind' to create a new age.

Ichinen Sanzen

The renowned sixth-century Buddhist scholar T’ien-t’ai (538–97) developed a meditative practice to enable people to perceive the boundless extent of their lives at each moment. He also developed a theoretical system to describe this reality. He called this “three thousand realms in a single moment of life” (Jpn. ichinen sanzen). Ichinen sanzen demonstrates that the entire phenomenal world exists in a single moment of life. Each person’s life contains infinite potential; this is the core belief of Nichiren Buddhism. While it may be easy to accept this in a theoretical sense, in reality we tend to impose limits on our possibilities. To a large extent we define our lives in terms of these perceived or unconscious limitations—I am able to do this but not that. We can exist quite comfortably within our own self-imposed limits, but when we come up against a problem or challenge and we feel we lack the ability or the spiritual resources to overcome it, we suffer. We feel overwhelmed or helpless, or afraid.